"""
665. 非递减数列
https://leetcode.cn/problems/non-decreasing-array/description/
"""
from typing import List


class Solution:
    def checkPossibility(self, nums: List[int]) -> bool:
        
    

if __name__ == '__main__':
    print(Solution().checkPossibility([4,2,3])) # True
    print(Solution().checkPossibility([4,2,1])) # False
    print(Solution().checkPossibility([3,4,2,3]))  # False
